The diagram demonstrates a process in which electricity is made by hydroelectric power station for the National grid.

Overall, there are several stages involved in the process which unlike between day and night. Starting worked from a high-level reservoir in the morning on the contrary low-level reservoir would establish in the night. To begin with the nature resource, river go through the dam which is opened only in the daytime. After that the water subsequently flow in to generate electricity where it has reversible turbines to transport directly to the generator. Then, the energy passed over to the power lines, finally placing in the National grid to use in various of advantages On the other hand, In the nighttime low-level reservoir continuously rebound to the higher pool by pumping back into the same turbines. More specifically, to accumulate the value of the river to produce the energy in the following day. In conclusion, it represents that the hydroelectric power station is a renewable energy. Moreover, the more amount of water lever they have the more ton of power they can obtain.